﻿/**
 
* Cookie plugin
 
*
 
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
 
* Dual licensed under the MIT and GPL licenses:
 
* http://www.opensource.org/licenses/mit-license.php
 
* http://www.gnu.org/licenses/gpl.html
 
*
 
*/



/**
 
* Create a cookie with the given name and value and other optional parameters.
 
*
 
* @example $.cookie('the_cookie', 'the_value');
 
* @desc Set the value of a cookie.
 
* @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
 
* @desc Create a cookie with all available options.
 
* @example $.cookie('the_cookie', 'the_value');
 
* @desc Create a session cookie.
 
* @example $.cookie('the_cookie', null);
 
* @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
 
*       used when the cookie was set.
 
*
 
* @param String name The name of the cookie.
 
* @param String value The value of the cookie.
 
* @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
 
* @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
 
*                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
 
*                             If set to null or omitted, the cookie will be a session cookie and will not be retained
 
*                             when the the browser exits.
 
* @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
 
* @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
 
* @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
 
*                        require a secure protocol (like HTTPS).
 
* @type undefined
 
*
 
* @name $.cookie
 
* @cat Plugins/Cookie
 
* @author Klaus Hartl/klaus.hartl@stilbuero.de
 
*/



/**
 
* Get the value of a cookie with the given name.
 
*
 
* @example $.cookie('the_cookie');
 
* @desc Get the value of a cookie.
 
*
 
* @param String name The name of the cookie.
 
* @return The value of the cookie.
 
* @type String
 
*
 
* @name $.cookie
 
* @cat Plugins/Cookie
 
* @author Klaus Hartl/klaus.hartl@stilbuero.de
 
*/

jQuery.cookie = function (name, value, options) {

    if (typeof value != 'undefined') { // name and value given, set cookie

        options = options || {};

        if (value === null) {

            value = '';

            options.expires = -1;

        }

        var expires = '';

        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {

            var date;

            if (typeof options.expires == 'number') {

                date = new Date();

                date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));

            } else {

                date = options.expires;

            }

            expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE

        }

        // CAUTION: Needed to parenthesize options.path and options.domain

        // in the following expressions, otherwise they evaluate to undefined

        // in the packed version for some reason...

        var path = options.path ? '; path=' + (options.path) : '';

        var domain = options.domain ? '; domain=' + (options.domain) : '';

        var secure = options.secure ? '; secure' : '';

        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');

    } else { // only name given, get cookie

        var cookieValue = null;

        if (document.cookie && document.cookie != '') {

            var cookies = document.cookie.split(';');

            for (var i = 0; i < cookies.length; i++) {

                var cookie = jQuery.trim(cookies[i]);

                // Does this cookie string begin with the name we want?

                if (cookie.substring(0, name.length + 1) == (name + '=')) {

                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));

                    break;

                }

            }

        }

        return cookieValue;

    }

}; 
